"Rental Fee"

Luring the spirits without trapping them? 

Zev tilted his head in confusion. 

[How do we do that?] The toddler with his diaper showing everywhere clicked his tongue. 

[The reason why the spirits come to this place is because of the abundant spiritual energy, but they don't want to live in this place forever, okay?] 

So how is it possible that they could keep the spirits without using the spirit barrier to trap them unless they made a contract with the shamans visiting the place? 

If not for the barrier, would the spirits make a contract with a newbie shaman? No! 

Most spirits wanted to be free ones, living an eternal life as long as their soul was still intact and they had lingering feelings in this world. 

Of course, a sufficient spiritual energy intake was also needed. 

But in general, the dead spirits didn't want to make a contract with a human where they had to work hard to possess the human and use their abilities…